{"NOAAStudyId":"26091","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2019-02-09","dataPublisher":"NOAA","dataType":"CLIMATE FORCING","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/climate-forcing","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-forcing-26091.xml","doi":null,"earliestYearBP":4342000,"earliestYearCE":-4340050,"entryId":"noaa-forcing-26091","funding":[],"investigators":"Seki, O.; Foster, G.L.; Schmidt, D.N.; Mackensen, A.; Kawamura, K.; Pancost, R.D.","mostRecentYearBP":4000,"mostRecentYearCE":-2050,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/26091","originalSource":null,"publication":[{"abstract":"The Pliocene period is the most recent time when the Earth was globally significantly (~3C) warmer than today. However, the existing pCO2 data for the Pliocene are sparse and there is little agreement between the various techniques used to reconstruct palaeo-pCO2. This disagreement, coupled with the general low temporal resolution of the published records, does not allow a robust assessment of the role of declining pCO2 in the intensification of the Northern Hemisphere Glaciation (INHG) and a direct comparison to other proxy records are lacking. For the first time, we use a combination of foraminiferal (d11B) and organic biomarker (alkenone-derived carbon isotopes) proxies to determine the concentration of atmospheric CO2 over the past 5 Ma. Both proxy records show that during the warm Pliocene pCO2 was between 330 and 400 ppm, i.e. similar to today. The decrease to values similar to pre-industrial times (275-285 ppm) occurred between 3.2 Ma and 2.8 Ma - coincident with the INHG and affirming the link between global climate, the cryosphere and pCO2.","author":{"name":"Osamu Seki, Gavin L. Foster, Daniela N. Schmidt, Andreas Mackensen, Kimitaka Kawamura, Richard D. Pancost"},"citation":"Osamu Seki, Gavin L. Foster, Daniela N. Schmidt, Andreas Mackensen, Kimitaka Kawamura, Richard D. Pancost. 2010. Alkenone and boron-based Pliocene pCO2 records. Earth and Planetary Science Letters, 292(1-2), 201-211. doi: 10.1016/j.epsl.2010.01.037","edition":null,"identifier":{"id":"10.1016/j.epsl.2010.01.037","type":"doi","url":"http://dx.doi.org/10.1016/j.epsl.2010.01.037"},"issue":"1-2","journal":"Earth and Planetary Science Letters","pages":"201-211","pubRank":"1","pubYear":2010,"reportNumber":null,"title":"Alkenone and boron-based Pliocene pCO2 records","type":"publication","volume":"292"}],"reconstruction":"N","scienceKeywords":null,"site":[{"NOAASiteId":"19232","geo":{"geoType":"Feature","geometry":{"coordinates":["12.75","-78.73"],"type":"POINT"},"properties":{"easternmostLongitude":"-78.73","maxElevationMeters":"-2827","minElevationMeters":"-2827","northernmostLatitude":"12.75","southernmostLatitude":"12.75","westernmostLongitude":"-78.73"}},"locationName":"Ocean>Pacific Ocean>North Pacific Ocean","mappable":"Y","paleoData":[{"NOAADataTableId":"38014","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>climate forcing>carbon dioxide"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/seki2010odp999boron.txt","linkText":"ODP999 Boron Isotope and CO2 Data","urlDescription":"NOAA Template File","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>climate forcing>carbon dioxide"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/trace_gases/Paleo-pCO2/seki2010odp999boron.xlsx","linkText":"ODP999 Boron Isotope and CO2 Data","urlDescription":"Excel File","variables":[]}],"dataTableName":"Seki2010ODP999boron","dataTableNotes":null,"earliestYear":4342000,"earliestYearBP":4342000,"earliestYearCE":-4340050,"mostRecentYear":4000,"mostRecentYearBP":4000,"mostRecentYearCE":-2050,"species":[],"timeUnit":"cal yr BP"}],"siteName":"ODP 999A"}],"studyCode":null,"studyName":"Paleo-pCO2 Database ODP999 5 Million Year Boron Isotope and CO2 Data","studyNotes":"Paleo-CO2 derived from boron isotope measurements on marine sediment core ODP999A for the past 4 million years, contributed to the Paleo-pCO2 Database","version":"1.0","xmlId":"64394"}